TST: adding a test for get_environement_object

Author: ArthurJWH

tests/integration/test_environment_analysis.py

@@ -4,6 +4,7 @@
 
 import matplotlib as plt
 import pytest
+from rocketpy import Environment
 
 plt.rcParams.update({"figure.max_open_warning": 0})
 
@@ -55,3 +56,9 @@ def test_exports(mock_show, env_analysis):  # pylint: disable=unused-argument
     os.remove("env_analysis_dict")
     os.remove("wind_rose.gif")
     os.remove("export_env_analysis.json")
+
+
+@pytest.mark.slow
+@patch("matplotlib.pyplot.show")
+def test_get_environment_object(mock_show, env_analysis):  # pylint: disable=unused-argument
+    assert isinstance(env_analysis.get_environment_object(), Environment)